Re: Gear case lapping question

[jeff-register]

I have had issues with Scott Attwater clam shells leaking from the threaded holes pulling up & making a high spot. I use a flat surface to check for that is all. I never polish the mating surfaces. I leave the factory surface alone as a little roughed up will bond better. Cut the seal with square ends & with a little preload on the ends. Get the mating surfaces acetone clean then apply sealer. I let the sealer cure for a few days before adding oil as well. Check to be sure they are still a machined pair.